Whip-roll support for looms



July 9, 1929. s. OPERA-ro WHIP ROLL SUPPORT FOR LOOMS Filed sept. 5, 1928 WITNESS Patented July 9, 1929.

UNITED STATES PATENT OFFICE.

SILVIO OPER-ATO, OF PATERSON, NEW JERSEY, ASSIGNOR OF ONE-HALF T ALFONSO ABATI, OF PATERSON, NEW JERSEY.

WHIP-ROLL SUPPORT FOR LOOMS.

Application filed September 5, 1928. Serial No. 304,076.

It is well known in the art of weaving to provide for the yield of the whip-roll of a loom against an elastic medium whereby to reduce the tendency of slippage of the warpbeam in a jerky or sudden fashion to cause uneven spacing of the shot-s of filling, known as shiers when the shots are too widely spaced and as barre marks when they are too close. The principal object of this invention is to provide a whip-roll support which may be readily attached to any loom and which will more perfectly serve the purpose above indicated than others of its class heretofore devised.

In the drawing,

Fig. 1 is a side elevation of a loom embodying the invention;

Fig. 2 is a plan of the device;

Fig. 3 is a side elevation thereof; and

Figs. 4 and 5 sections on lines 4 4 and h, respectively, in Fig. 3, block 11 appearing shifted in Fig. 5.

rIhe loom frame 1 has journaled therein as usual the warp-beam 2 around which extends the usual fiexible brake device, as a rope 3, which at its rear end has attached the tension weight 4 and at its forward end the controlling weight 5. The latter weight from time to time, as the weaving proceeds and the warp is advanced, contacts with the floor, producing in' the well-known way slippage of the rope on the beam with consequent let-off rotation of the beam. The letoff motion of the beam, especially whenA taken with the beating-up action of the lay or batten of the loom, is sometimes sudden or jerky in character and, as indicated, unlessit is compensated for it is responsible for the mentioned imperfections lieing produced in the fabric. At G is indicated the whip-roll over which the warp extends from the beam 2.

A bracket is bolted to the side of the loom frame which consists of a horizontally elongated housing 7 and a geb S depending therefrom. The web 8 has a vertical slot 9 to receive the bolt 10 by which the bracket is thus secured tothe loom frame and which thus permits the bracket to be adjusted vertically according to the requirements of the loom.

The housing contains a bearing block 11 which is substantially rectangular `in crosssection and fairly snugly fits the cr0ss-sec tionally rectangular interior of the housing,

said block being provided with a transverse upwardly open groove 11L which forms the actual bearing. The housing also contains a spiral spring 12 having one end hooked into an eye 11b on the block and the other into the eye of an eye-bolt 13 which is tapped into the outer end of the housing and may be fitted with a lock-nut 14 bearing against said end of the housing.

The trunnion 6 of the whip-roll is adapted to be journaled in the bearing 11, and for admitting it to such bearing and permittingthe whip-roll to move horizontally with the block there is an L-shaped slot 15 formed in the inner side wall of the housing with one leg thereof extending forwardly and the other terminating at the top edge of said wall. In the normal operation of the device the trunnion under the pressure of the sheet of warp and fabric on the whiproll will occupy the forwardly extending leg of said slot, or more or less the dotted position shown in Fig. 3, so that it cannot work out of the bearing.

In the preferred form, the top of the housing', which with the web may form a single casting, is open so that access may be had to the spring, as when the same is to be changed for one of different power. However, I prefer to provide a removable cover, suoli as the slide 16 shiftable into and out of the covering relation in grooves 17 in the side walls of the housing.

YIt will be understood that the device will as above described be duplica-ted, one being secured to each side of the loom frame so as to support each end of the whip-roll.

In addition to the (tension) spring 12 the housing may also contain, forward of the block 11 and abutting the forward end of the housing, a compression spring 18.

As indicated, I am aware that it has been proposed to provide for the yield of a whiproll against some elastic medium whereby to reduce the tendency of the sudden or jerky slippage of the Warp-beam to cause uneven spacing of the shots of filling and imperfect fabric. My construction is an improvementon these known devices-to the end that in use it attains more nearly to perfect action and consequently to the production of fabric in `which the mentioned defects are substantially completely eliminated-because the Whip-roll, being journaled in bearing blocks subject to the spring action and therefore affording bearing intermediaries between the spring and whip roll, is more perfectly free to rotate backward and forward. Of course, as indicated, the beating-up action of the lay or batten is in any event a factor in promoting slippage of the warp-beam, and since the whip-roll is quite free to rotate as well asv yield lengthwise of the fabric-and-warp sheet there is less tendency for such action to promote the slippage and when it does occur it is completely taken up because of the freedom of the whip-roll to react both rotatively and by sliding in the guideways afforded by the brackets.

Adjustment of the tension of the spring is possible by manipulating screw 13; or upon removing the cover 16 the spring may be changed for one of different power. If the beating up action of the loom is exceptionally severe the spring 18 may be used to augment the elastic resistance of spring 12. I prefer tol use a tension spring (12) rather than a compression spring where both are not used because its action does not cause such displacement thereof as to set up undue friction against the interior of the housing, which latter not only supports the whip-roll carrying blocks but conceals all moving parts and if lubricant is used acts as a sheath.

Having thus fully described my invention, what I claim is:

In a loom, a supporting structure having a guideway and also an upright side wall both extending lengthwise of the fabric-andwarp sheet in the loam, said side wall having a slot which as to one portion thereof extends lengthwise of said sheet and as to another portion extends to the top of said wall from a point in the first-named portion short of its forward end, said slot being adapted to receive the trunnion of a whiproll, a whip-roll-carrying member slidable along the guideway and having a bearing for said tru-nnion in which the latter is held against movement? with respect to said member in the relatively forward direction, and spring means yieldingly opposing movement of said member in said direction.

In testimony whereof I affix my signature.

SILVI() OPERATO. 

